Circuit-controlling device.



0. M. LEIGH. CIRCUIT CCNTCCLLINC DEVICE. APPLICATION FILED PBB.20, 1913.

1, 1 15,446. v 'Patented Cos/,1914.

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0. M. LEICH. GIRGUIT GONTROLLING DEVICE. APPLICATION FILED FEB. 20,1913. 1,1 1 5,4469 Patented oet. 2'?, 1914 2 SHEETS-SHEET 2.A

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OscAn ir. Lnieii, or GENOA, ILLINOIs, AssIeNon rro cnAcnAr'i,Lnrcirnnncrnic v -coivirANiaOr GENOA, ILLINOIS.

CIRCUIT-CONTROLLING revien.

t p specificaties of Lettersratene Patentedotfm 1914.

,Application ied February 20,1913. Serial No. 749,618.

To all whom it may concern:

Be it known that I, OsoAa M. Liiicia, a citizen of the UnitedStates,residing at Genoa, in the countyfof Dekalb and State of Illinois,have invented a certain new-and useful Improvement inCircuit-Controlling Devices, of which the following is a full, clear,concise, and exactf description', reference being had to theaccompanying drawings, forming a part of this specification.

My invention relates to circuit controlling n devices and provides meansfor the purpose of'transinitting a rprolonged impulse over a circuit;

. More particularly my invention is applied to desk or portabletelephone stands, the switching means being yunderthe control of theswitchhook to transmit a prolonged impulse preferably whenever the hookis moved either up or down.

The general nature of the switcliiiigide-k vices is such that after thehook has come to rest they impulse ceases, the devices being of such a`character to prolong this impulse'l beyond thetime that wouldordinarily be given to it with its lengthr dependent solely upon thetime required to `move the switchhook lever from one other. i n I willdescribe one form which my invention may take by referring to theaccompanying drawings, in whichp Figure 1 is a sectional View of a desktelephone constructed in accordance with my invention; Fig.f2 is adetail of construction; Fig. 3 is a bottom view of the stand, and Figs.4 and 5 are Lalternate views of the switching devices. y Y

Referring lmore particularly to Fig. 1,'I show a switchliooklever 1adapted to control a plunger 2, 'which plunger is normally pressedupwardly by a spring 3 so that this lunger 2 follows the movement of theswitchhook lever 1. rIhe movementsof this limiting position to theswitchhook lever of course are suitably iin-1 tion` of certainswitchingsprings as the plunger is movedup and down. The arrangement of thesesprings andtlieir operation, however,` does not form part 'of mypresentinvention.

the plunger 2. `These My invention herein is particularly concerned withthe control of` the circuit through springs 8, 9, 10 and 11, the controlof which springs is also suitably eected by springs are suitably mountedon a plate 12 "lield in place by means of the screws 13upon the radialarms 14 vand 15, which'radia-l arms are secured together with thestandardy 16 and base 17. These springs 8 9, 10 and 11 are so arrangedthat springs 10 and 11 are in electrical contact, being connectedtogether as more clearly shown in Fig. 5, but these ytwo springs areinsulated from the springs 8 and.

9, which springs 8 and 9 are also insulated from each other by. means ofthe pieces of insulation 18, a suitablel distance piece 19 then beinginterposed between these springs and insulation and the arm 12, suitablescrews 20- holding these` befor'ementioned parts together. e Thesesprings 8, `9, 10 and 11 are adapted to control a signal sending circuitand 'for thisreason'are designed to transmit an impulse whenever theswitchhook lever 1 -inoves from one limiting posi.- tion to the other.It is of course necessary therefore that these springs be so arrangedthatV ay Contact is ymade as thev switchhook lever l moves, 'whichcontact is broken somep time after the lever reaches its limiting ,po-

sition. It is necessary to have this impulse of a prolonged characterbecausejthe sud-` den impulse due to momentary Contact frequently doesnot overcome the self-induction of the .circuit and lfails for otherreasons, and tov this end suitable delaying means presently to bedescribed, of novel character, are provided to prolong this impulsebeyond the time which wouldbe given to it were its time durationdependent merely upon the movement of the switchhook. 4Inlaspe-l cificform herein shown thereforefit will` ber seen that the switchliook leverl liii one position controls the springs 7 to arrange the talkingcircuit for conversation and in the other position opensthe talkingcircuitl and this switchhook lever l at the same time as it movesdownwardly causes springs 9 and 10 to engage to close a circuit, and onits upwardmovement causes springs 8 and 11 to engage to close a circuit.vThis circuit between these springs however is always open,

that it is not shortly after being made so n but i`s` merely of ,thepermanent character,

a passing circuit closure, which passing cirl ioo cuit closure providesa prolonged impulse. The plunger 2 has a portion 21 of restricteddiameter adapted to engage the forked arm of a lever 22, which lever ispivotally mounted to a depending arm 23 of the plate 12 through theagency of the shaft 24. As the plunger 2 moves up and down the lever 22is oscillated as is readily apparent.A This lever 25 which carries atrigger 26, shown' more in detail in Fig; 2. This trigger has apertures27 so that by means of a shaft 28 it is mounted upon the arm 25 asstated. This trigger 26 is preferably made of one piece and consists of`a substantially U-shaped framework 29 having an arm 30 bent awaytherefrom and then parallel thereto, and then having a further arm 31similarly bent. The arms 30 and 31 are respectively provided withapertures 32, 32 to which coiled springs 33 are attached, and theopposite extremities of these Vcoiled springs are mounted upon arms 23,23 which extend downwardly from the plate 12 and which also carry thelever 22.

The trigger has a piece of insulation 34 preferably cylindricalextending from the arm 31 and this is held in place by means of a screw35 extending preferably through both legs of the U-shaped portion 29.This insulating element 34 is designedto engage the springs 10 or 11 asthe case may be to press the same into engagement with the springs 3 or9. The lever 22 has a bent portion 36 against which the trigger rests invone of its limiting positions. In the other limiting position theinclined surface 37 of the trigger rests against the surface 38 (Fig. 5)of the lever 22.

It will be seen more clearly from Fig. 5, which shows the elements in amore or less intermediate position that the spring 33 is only in linewith the pivotal mounting of the trigger 26 during suoli intermediateposition and that these springs 33 will reverse the position of theelement 26 the minute this element has slightly passed the neutralpoint. The springs serve the purpose of placing the roller34 in anintermediate position such as shown in Fig. 4 after an actuation of thesprings. As the lever is in its uppermost position the elements all havethe position shown in Fig. 4. Should the lever be moved downwardly, thenthe plunger 2 of Fig. 5 would travel just a trifle lower than theposition shown in Fig. 5, and will force the parts into vthe positionshown in Fig. 1, with the surfaces 37 and 3S in engagement. In thisposition it will be seen that the springs have again restored. thetrigger y to such a position that the roller 34 holds the springs 10 and11 in an intermediate position, not contacting with either the spring 8or the spring` 9. This it is thoughtwill illustrate the manner ofoperation. The

22 has a downwardly extending arm trigger 26 by reason of the springaction prolongs the contact between either of the springs 10 and l1 andthat particular spring 8 or 9 with which said springs 10 and 11 may beinv engagement.

From what has been described it is thought theinvention will be clearas'will also the fact that many modifications may be made thereofwithout departing from its spirit, as the specific device illustratedherein is for illustrative purposes merely, and

What I therefore claim as new and desire to secure by Letters Patent is:

1.4In a vdeviceof the character` described the combination with a pairof springs electrically connected together, and having bent divergingends, additional 'springs one adaptedfor association with each of thesprings aforesaid, an element adapted for in" terposition between thediverging ends of the aforesaid springs adapted to move one or the otherof said springs, a lever for moving said elements, and resilient meansinterposed bey tween said leverand said elements.

2. In a device of the character described the combination with a pair ofsprings electrioally connected together, and having bent diverging ends,additional springs one adapted for association with each of the springsaforesaid, an element adapted for interposition between the divergingends of the aforesaid springs adapted to move one or the other of saidsprings, a lever for` moving said element, and a spring interposedbetween said lever and said element.

3. In a device of the character described the combination with a pair ofsprings electrically connected together, and having bent diverging ends,adapted for association with each of Vthe springs aforesaid, a triggeradapted for interposition between the diverging ends of the aforesaidsprings adapted to move one or the other of said springs, a lever formoving said trigger, and tween said lever and said trigger.

4. In a device of the character described the combination with a pair ofsprings eleca spring interposed betrically connected together, andhaving bent v diverging ends, additional springsv one adapted forassociation with each of the springs aforesaid, ay trigger adapted forinterposition between the-diverging ends of the aforesaid springsadapted tomove one or theother of said springs, a lever for movingsaidtrigger, and a spring interposed between said'lever and said trigger,said trigger having means forming angularly disposed surfaces adapted toengage the lever to define the limits of themovement of said trigger.

5. In a device of the character described the combination with a'switchspring, a second switch spring adapted for periodic engagementtherewith, and means 4for controlling the periodic engagement of saidsprings, said means including a lever, a trigger thereon, and yieldingmeans interposed between said trigger and lever.

6. In a device of the character described the combination with a switchspring,a second switch spring adapted for periodic vengagementtherewith, and means for controlling the periodic engagement of saidsprings, said means including a lever, a trigger thereon, and yieldingmeans interposed between Copies of this patent may be obtained for saidtriggerand lever tov actuate said trigger when at its critical positionto thereby cause engagement of said springs during movementy only ofsaid controlling means. i

In witness whereofI hereunto subscribe my name this 5th day'yofFebruary, A. D.

` @SCAR M. LEICH.

Witnesses:

O'rro M. ,WERMICE MAX W. ZABEL.

Washington, D. G.

